Vapi makes voice AI fast and approachable: assistants in minutes, sub-second latency, full function calling. The next problem is institutional, not technical — versioning the prompts your assistants run on, enforcing what they can and can't say, and producing a call-level audit trail that survives a compliance review. ECP is that layer.
Building a Vapi assistant is a weekend project. Running 50 of them in production for a regulated business is a different category of problem. Prompts drift after model updates. A field engineer tweaks a system message at 2am and nobody notices for two weeks. A new GPT-4o release shifts assistant behavior across your entire fleet on the same day. Compliance asks for a call-level audit trail — what the assistant was instructed to do at the moment of the call — and your only answer is the transcript. Vapi tells you what was said. Elacity ECP tells you what the assistant was governed to do, why, and by whom.
Vapi handles the voice runtime. ECP handles the governance surface around it.
| Capability | Vapi native | With ECP |
|---|---|---|
| Real-time voice runtime | ||
| Function / tool calling | ||
| Call recordings & transcripts | ||
| Prompt versioning & rollback | ||
| Per-assistant policy enforcement | ||
| Tool-call RBAC | ||
| Cross-assistant drift detection | ||
| Model-swap impact assessment | ||
| Immutable instruction-level audit trail | ||
| HIPAA / SOC 2 governance layer |
Real-time voice runtime
Function / tool calling
Call recordings & transcripts
Prompt versioning & rollback
Per-assistant policy enforcement
Tool-call RBAC
Cross-assistant drift detection
Model-swap impact assessment
Immutable instruction-level audit trail
HIPAA / SOC 2 governance layer
Your Business Logic
│
▼
┌───────────────────┐
│ Elacity ECP │ ← Prompt registry, policy engine,
│ Control Plane │ drift monitor, audit trail
└───────────────────┘
│
▼
┌───────────────────┐
│ Vapi │ ← Voice runtime, STT/TTS, function
│ Voice Assistants │ calling, telephony, latency budget
└───────────────────┘
│
▼
Live Phone CallEvery system prompt, every first-message, every voice config — versioned, diff'd, attributed to a user. Roll back any Vapi assistant to any prior state in seconds. No more 'who edited the prompt last Friday' archaeology.
Define what each Vapi assistant is allowed to say, ask, offer, or commit to. ECP resolves the policy at config time, not after the call. Guardrails that gate behavior before it ships, not after the complaint email.
Vapi function calls hit your CRM, payments, scheduling, internal APIs. ECP applies role-based access control so only the right assistants can invoke the right tools — with a signed log of every call.
Running 30 outbound assistants, each tuned slightly differently? ECP continuously baselines them and flags behavioral variance — across deploys, model versions, and prompt edits — before drift turns into a regulatory event.
When you move from GPT-4o to a newer model — or Vapi pushes a default change — ECP runs a behavioral baseline comparison and flags affected assistants for review before the swap touches live traffic.
Per-call, ECP logs the exact prompt, model, voice, function set, and policy state the assistant was running with. Pass HIPAA, PCI, and SOC 2 reviews without scrambling for screenshots.
Vapi made voice AI a developer-tier product — minutes from idea to production assistant. The teams running it at scale (collections, healthcare intake, real estate qualification, support deflection) are now hitting the same wall every fast-moving AI category hits: governance arrives late, and security teams stop deploys cold. ECP is the answer that doesn't require a replatform.
Connect ECP to your existing Vapi account via API.
Import current assistant configs and tool definitions.
Set baseline policies, prompt snapshots, and tool RBAC.
Turn on drift monitoring and call-level audit capture.
Estimated setup: Less than 1 day to your first governance event
Elacity runs ECP internally across roughly 1,000 active agents — including voice assistants. Same control plane we deploy with Vapi customers. Production infrastructure, not a demo.
We get this question a lot, so it's worth being explicit. Vapi and Elacity ECP solve adjacent problems, not overlapping ones.
Flat governance capability pricing. Not per agent. Not per call. Not per token.
No per-minute fee. No per-assistant tax. Vapi scales however Vapi scales — ECP stays flat.
Built for teams shipping voice AI faster than their compliance team can review it.